How can I get rid of Google services pop up ads!?

[CaiteH91]

I have a HTC one m8 (which is the best phone I've ever used, EVER!) and since the recent update (5.0.1) I've started getting pop up ads from Google services. It's a full screen ad and it's driving me insane. I've tried ad detectors, anti virus, force closing the app and none of it works. I'll put a screen shot of it up in the comments, please help!

 

[Morq]

You must have installed some 3rd party app that causes this add to popup, for sure its not from google o.o

 

[dpen15]

Do you have AppLock free version installed? If yes, that app by default uses the full screen ad, you do have a choice to switch to banner ad instead though.

Sent from my SAMSUNG-SM-G900A using Tapatalk